Thermal insulation, leading to greater deposition of dew. In addition organic mulches also contribute to:

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E. All of the above

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Enhanced humification and microbial activity leading to higher nutrient availability

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Improvement of soil structure, by incorporation of plant residues and by encouraging soil fauna.

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Mulching is of profound importance in dry regions

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Even in more humid climates it may have very beneficial effects with certain species, e.g., the poplar

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